Why is there no Interstate 60 or 65?

Answered by Stephen Mosley

There are no Interstate 60 or 65 for several reasons. One of the main reasons is that the numbering system for the Interstate Highway System follows certain guidelines set by the American Association of State Highway and Transportation Officials (AASHTO) and the Federal Highway Administration (FHWA). These guidelines help ensure consistency and avoid confusion for drivers.

Firstly, the numbering of the Interstates is based largely on the existing U.S. Highway system. The U.S. Highway system already includes routes with numbers 60 and 65, which pass through multiple states. For example, U.S. Route 60 runs through states such as Virginia, West Virginia, Kentucky, Missouri, Oklahoma, and Arizona. Similarly, U.S. Route 65 runs through states like Minnesota, Iowa, Missouri, Arkansas, and Louisiana.

According to the AASHTO and FHWA guidelines, Interstate routes should generally not duplicate existing U.S. Highway numbers within the same state. This is done to prevent confusion and ensure efficient navigation for drivers. If an Interstate were to be numbered with the same number as an existing U.S. Highway within a state, it could lead to potential mix-ups and difficulties in route planning.

Additionally, the numbering system for Interstates follows a specific pattern. Even-numbered Interstates generally run east-west, while odd-numbered Interstates generally run north-south. This pattern helps drivers easily identify the general direction of travel when navigating the highway system.

For example, Interstate 10 runs east-west across the southern United States, while Interstate 95 runs north-south along the East Coast. This pattern simplifies navigation and provides a sense of consistency for drivers traveling across different states.

It’s worth noting that there are exceptions to the east-west and north-south pattern, such as Interstate 4 in Florida, which runs east-west, and Interstate 35, which runs north-south in parts but also has sections that run east-west. However, these exceptions are typically limited to specific regions or circumstances.

Another factor that may contribute to the absence of Interstate 60 or 65 is the need for continuity in the highway system. The Interstates are meant to provide a connected network of highways, facilitating efficient travel across the country. Introducing a new Interstate with numbers that duplicate existing U.S. Highways could disrupt the continuity of the system and potentially lead to confusion.

In terms of personal experiences, I have traveled extensively across the United States and have often relied on the Interstate Highway System for long-distance travel. The numbering system, though sometimes complex, has generally provided a clear and efficient way to navigate the highways. I have found that the absence of I-60 and I-65 has not posed any significant challenges in terms of route planning or navigation.

To summarize, there is no Interstate 60 or 65 due to the guidelines set by AASHTO and FHWA, which aim to avoid duplication of existing U.S. Highway numbers within states and maintain consistency in the highway system. The numbering system follows a specific pattern to aid navigation and ensure continuity in the network of Interstates.